Paper Predict NotesCBSE Class 10 Science: important topics by chapter
Chapter-by-chapter guide to Class 10 Science, with diagrams, case-based questions and answer tips.
Paper Predict Notes · 28 Mar 2026
CBSE Class 10 Science has an 80-mark paper and 20 internal marks, covering Chemistry, Biology and Physics. Questions range from one-mark MCQs to long answers and case-based questions, and NCERT is the main source.
This guide covers the Class 10 Science important topics by chapter. Check the latest CBSE syllabus for your year.
Chemistry
Chemical reactions and equations, acids, bases and salts, metals and non-metals, and carbon and its compounds. Balancing equations, types of reactions, pH and uses of common salts, reactivity series, and functional groups with naming are asked most years.
Biology
Life processes, control and coordination, how organisms reproduce, heredity, and our environment. Nutrition, respiration, transport and excretion in humans and plants, the reflex arc, human reproductive systems and Mendel's experiments are common long answers.
Physics
Light (reflection and refraction), the human eye and the colourful world, electricity, and magnetic effects of electric current. Mirror and lens formula numericals, ray diagrams, Ohm's law and series and parallel circuits are asked most years.
Revise this faster: Class 10 CBSE Science Notes — handwritten, colour-coded notes with points often asked, PYQs and tricks in every chapter.
Diagrams
- Human digestive system, heart, nephron and the reflex arc
- Human male and female reproductive systems
- Ray diagrams for mirrors and lenses, and refraction through a prism
- Electric circuits and magnetic field lines around a conductor
Case-based questions
Read the passage once for context and then the questions. Most answers are in the passage or come straight from the NCERT concept it describes.
Answer writing
Use NCERT terms, write balanced equations, show formula and units in numericals, and add a labelled diagram where it helps.
Frequently asked questions
Which part of Science is most scoring?
Chemistry equations and Physics numericals are quick marks with practice. Biology rewards diagrams and NCERT terms.
Is NCERT enough for Class 10 Science?
Yes. Read the text, intext questions and exercises, then do sample papers and PYQs.
How do I get ray diagrams right?
Use a ruler, draw arrows on every ray and follow the sign conventions.
The short version
Revise all three sections from NCERT, practise equations, numericals and labelled diagrams, and read case-based passages carefully.
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